How is this different from the Color Remover tool?

The Color Remover does an all-or-nothing swap: any pixel within tolerance is fully replaced. This tool instead blends proportionally: pixels closer to your source color get replaced more fully, fading out smoothly toward tolerance's edge, which avoids a hard, jagged transition around anti-aliased or gradient-shaded source colors.

What does the strength slider control?

Strength (0-100) caps how much of the destination color can blend in even for a perfect color match. At 100, the closest matches are fully replaced; at lower values, even a perfect match only partially shifts toward the destination color.

Can I use this to remove a color instead of swapping it?

Not to true transparency, since JPG has no alpha channel. But setting the destination color to match your intended background achieves a similar practical result to 'removal', same as the Color Remover tool.

Does tolerance work the same way as in the Color Remover?

The underlying distance measurement (Euclidean RGB distance, 0-441 max) is the same, but here it also controls how quickly the blend fades out, rather than being a hard yes/no cutoff.

JPG Color Replacer - Swap One Color for Another in a JPEG

Overview

Introduction

This tool swaps one color for another across a JPG, entirely in your browser, with a soft proportional blend rather than a hard on/off replacement.

It's framed around 'swap one thing for another' rather than 'delete something', the same underlying color-distance idea as the Color Remover, positioned and tuned for smoother transitions.

What Is JPG Color Replacer?

A client-side color-swap tool that measures each pixel's Euclidean distance from a chosen source color and blends it toward a destination color, with the blend strength scaling both by how close the match is and by an overall strength you set.

The proportional fade is what distinguishes it from a hard color-key cutoff: pixels near the edge of your tolerance shift only slightly, while near-exact matches shift close to fully.

How JPG Color Replacer Works

For each pixel within tolerance of the source color, the tool computes a 'closeness' value (1 at a perfect match, fading to 0 at the tolerance boundary) and multiplies it by your strength setting to get the final blend amount.

Each RGB channel is then linearly interpolated between its original value and the destination color's value by that blend amount, so the transition is smooth rather than a hard edge.

When To Use JPG Color Replacer

Use it to recolor a specific element, such as a product's accent color, a logo detail, or a patch of clothing, while preserving soft, anti-aliased edges naturally.

It's a better fit than the Color Remover whenever the source color has gradients or soft edges you don't want to turn into a hard cutout.

Often used alongside JPG Color Remover, JPG Color Shade Adder and PNG Colors Swapper.

Features

Advantages

Smooth, proportional blending avoids hard edges around anti-aliased or gradient source colors.
Independent tolerance and strength controls give fine control over both how wide a net is cast and how strongly matches shift.
Runs entirely client-side; your image is never uploaded anywhere.

Limitations

Cannot produce true transparency: like all JPG tools in this category, the destination is always another solid color.
The soft blend can leave a faint gradient halo around the swapped region, which a hard-cutoff tool like Color Remover would not.

Examples

Recolor a product's accent stripe

Input

A photo with a red accent stripe, source #d32f2f, destination #1976d2, tolerance 50, strength 100

Output

The stripe shifts smoothly to blue, with soft edges preserved

High strength with moderate tolerance gives a full, clean color swap without hard cutout edges.

Subtle color nudge

Input

Any JPG, tight tolerance, strength 30

Output

Only the closest color matches shift, and only partially toward the destination

Low strength produces a gentle color-grading-like nudge rather than a full swap.

Best Practices & Notes

Best Practices

Use a moderate tolerance with high strength for a clean, complete swap of a solid-colored element.
Lower the strength for a subtler, color-grading-style adjustment instead of a full replacement.

Developer Notes

replaceJpgColor is a pure lib function: it parses source/destination hex colors, validates tolerance (0-441) and strength (0-100), then for each pixel within tolerance computes closeness = 1 - distance/tolerance and blend = closeness * (strength/100), linearly interpolating each RGB channel toward the destination by that blend amount.

JPG Color Replacer Use Cases

Recoloring a product accent or brand color across a photo
Softly nudging a color palette without a hard cutout edge
Swapping a color while preserving anti-aliased or gradient-shaded edges

Common Mistakes

Setting strength to a low value and expecting a full color replacement: strength caps how much even a perfect match shifts.
Using a very high tolerance and accidentally sweeping in unrelated colors.

Tips

Start with strength at 100 to see the maximum effect, then dial it down if the transition feels too aggressive.
For a simpler, hard-cutoff replacement instead, use the Color Remover tool.

JPG Color Replacer